640147220

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{131}}^1\times {\mathrm{3347}}^1$

素因数の和:3560

約数の個数: 48

約数和(自身を含む): 1373537088

約数和(自身を除く): 733389868

約数列:

[1, 2, 4, 5, 10, 20, 73, 131, 146, 262, 292, 365, 524, 655, 730, 1310, 1460, 2620, 3347, 6694, 9563, 13388, 16735, 19126, 33470, 38252, 47815, 66940, 95630, 191260, 244331, 438457, 488662, 876914, 977324, 1221655, 1753828, 2192285, 2443310, 4384570, 4886620, 8769140, 32007361, 64014722, 128029444, 160036805, 320073610, 640147220]

約数ペア:

[(1, 640147220), (2, 320073610), (4, 160036805), (5, 128029444), (10, 64014722), (20, 32007361), (73, 8769140), (131, 4886620), (146, 4384570), (262, 2443310), (292, 2192285), (365, 1753828), (524, 1221655), (655, 977324), (730, 876914), (1310, 488662), (1460, 438457), (2620, 244331), (3347, 191260), (6694, 95630), (9563, 66940), (13388, 47815), (16735, 38252), (19126, 33470)]