20821792280

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{211}}^1\times {\mathrm{34747}}^1$

素因数の和:35040

約数の個数: 64

約数和(自身を含む): 47735412480

約数和(自身を除く): 26913620200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 211, 284, 355, 422, 568, 710, 844, 1055, 1420, 1688, 2110, 2840, 4220, 8440, 14981, 29962, 34747, 59924, 69494, 74905, 119848, 138988, 149810, 173735, 277976, 299620, 347470, 599240, 694940, 1389880, 2467037, 4934074, 7331617, 9868148, 12335185, 14663234, 19736296, 24670370, 29326468, 36658085, 49340740, 58652936, 73316170, 98681480, 146632340, 293264680, 520544807, 1041089614, 2082179228, 2602724035, 4164358456, 5205448070, 10410896140, 20821792280]

約数ペア:

[(1, 20821792280), (2, 10410896140), (4, 5205448070), (5, 4164358456), (8, 2602724035), (10, 2082179228), (20, 1041089614), (40, 520544807), (71, 293264680), (142, 146632340), (211, 98681480), (284, 73316170), (355, 58652936), (422, 49340740), (568, 36658085), (710, 29326468), (844, 24670370), (1055, 19736296), (1420, 14663234), (1688, 12335185), (2110, 9868148), (2840, 7331617), (4220, 4934074), (8440, 2467037), (14981, 1389880), (29962, 694940), (34747, 599240), (59924, 347470), (69494, 299620), (74905, 277976), (119848, 173735), (138988, 149810)]