78788900

素因数分解:

$2^2\times 5^2\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{251}}^1$

素因数の和:381

約数の個数: 72

約数和(自身を含む): 178051104

約数和(自身を除く): 99262204

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 73, 86, 100, 146, 172, 215, 251, 292, 365, 430, 502, 730, 860, 1004, 1075, 1255, 1460, 1825, 2150, 2510, 3139, 3650, 4300, 5020, 6275, 6278, 7300, 10793, 12550, 12556, 15695, 18323, 21586, 25100, 31390, 36646, 43172, 53965, 62780, 73292, 78475, 91615, 107930, 156950, 183230, 215860, 269825, 313900, 366460, 458075, 539650, 787889, 916150, 1079300, 1575778, 1832300, 3151556, 3939445, 7878890, 15757780, 19697225, 39394450, 78788900]

約数ペア:

[(1, 78788900), (2, 39394450), (4, 19697225), (5, 15757780), (10, 7878890), (20, 3939445), (25, 3151556), (43, 1832300), (50, 1575778), (73, 1079300), (86, 916150), (100, 787889), (146, 539650), (172, 458075), (215, 366460), (251, 313900), (292, 269825), (365, 215860), (430, 183230), (502, 156950), (730, 107930), (860, 91615), (1004, 78475), (1075, 73292), (1255, 62780), (1460, 53965), (1825, 43172), (2150, 36646), (2510, 31390), (3139, 25100), (3650, 21586), (4300, 18323), (5020, 15695), (6275, 12556), (6278, 12550), (7300, 10793)]