646996900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:394

約数の個数: 144

約数和(自身を含む): 1619896320

約数和(自身を除く): 972899420

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 25, 44, 46, 50, 55, 92, 100, 107, 110, 115, 214, 220, 230, 239, 253, 275, 428, 460, 478, 506, 535, 550, 575, 956, 1012, 1070, 1100, 1150, 1177, 1195, 1265, 2140, 2300, 2354, 2390, 2461, 2530, 2629, 2675, 4708, 4780, 4922, 5060, 5258, 5350, 5497, 5885, 5975, 6325, 9844, 10516, 10700, 10994, 11770, 11950, 12305, 12650, 13145, 21988, 23540, 23900, 24610, 25300, 25573, 26290, 27071, 27485, 29425, 49220, 51146, 52580, 54142, 54970, 58850, 60467, 61525, 65725, 102292, 108284, 109940, 117700, 120934, 123050, 127865, 131450, 135355, 137425, 241868, 246100, 255730, 262900, 270710, 274850, 281303, 302335, 511460, 541420, 549700, 562606, 588179, 604670, 639325, 676775, 1125212, 1176358, 1209340, 1278650, 1353550, 1406515, 1511675, 2352716, 2557300, 2707100, 2813030, 2940895, 3023350, 5626060, 5881790, 6046700, 6469969, 7032575, 11763580, 12939938, 14065150, 14704475, 25879876, 28130300, 29408950, 32349845, 58817900, 64699690, 129399380, 161749225, 323498450, 646996900]

約数ペア:

[(1, 646996900), (2, 323498450), (4, 161749225), (5, 129399380), (10, 64699690), (11, 58817900), (20, 32349845), (22, 29408950), (23, 28130300), (25, 25879876), (44, 14704475), (46, 14065150), (50, 12939938), (55, 11763580), (92, 7032575), (100, 6469969), (107, 6046700), (110, 5881790), (115, 5626060), (214, 3023350), (220, 2940895), (230, 2813030), (239, 2707100), (253, 2557300), (275, 2352716), (428, 1511675), (460, 1406515), (478, 1353550), (506, 1278650), (535, 1209340), (550, 1176358), (575, 1125212), (956, 676775), (1012, 639325), (1070, 604670), (1100, 588179), (1150, 562606), (1177, 549700), (1195, 541420), (1265, 511460), (2140, 302335), (2300, 281303), (2354, 274850), (2390, 270710), (2461, 262900), (2530, 255730), (2629, 246100), (2675, 241868), (4708, 137425), (4780, 135355), (4922, 131450), (5060, 127865), (5258, 123050), (5350, 120934), (5497, 117700), (5885, 109940), (5975, 108284), (6325, 102292), (9844, 65725), (10516, 61525), (10700, 60467), (10994, 58850), (11770, 54970), (11950, 54142), (12305, 52580), (12650, 51146), (13145, 49220), (21988, 29425), (23540, 27485), (23900, 27071), (24610, 26290), (25300, 25573)]