20122506875

素因数分解:

$5^4\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{199}}^1\times {\mathrm{307}}^1$

素因数の和:574

約数の個数: 80

約数和(自身を含む): 27711129600

約数和(自身を除く): 7588622725

約数列:

[1, 5, 17, 25, 31, 85, 125, 155, 199, 307, 425, 527, 625, 775, 995, 1535, 2125, 2635, 3383, 3875, 4975, 5219, 6169, 7675, 9517, 10625, 13175, 16915, 19375, 24875, 26095, 30845, 38375, 47585, 61093, 65875, 84575, 104873, 124375, 130475, 154225, 161789, 191875, 237925, 305465, 329375, 422875, 524365, 652375, 771125, 808945, 1038581, 1189625, 1527325, 1893883, 2114375, 2621825, 3261875, 3855625, 4044725, 5192905, 5948125, 7636625, 9469415, 13109125, 20223625, 25964525, 32196011, 38183125, 47347075, 65545625, 101118125, 129822625, 160980055, 236735375, 649113125, 804900275, 1183676875, 4024501375, 20122506875]

約数ペア:

[(1, 20122506875), (5, 4024501375), (17, 1183676875), (25, 804900275), (31, 649113125), (85, 236735375), (125, 160980055), (155, 129822625), (199, 101118125), (307, 65545625), (425, 47347075), (527, 38183125), (625, 32196011), (775, 25964525), (995, 20223625), (1535, 13109125), (2125, 9469415), (2635, 7636625), (3383, 5948125), (3875, 5192905), (4975, 4044725), (5219, 3855625), (6169, 3261875), (7675, 2621825), (9517, 2114375), (10625, 1893883), (13175, 1527325), (16915, 1189625), (19375, 1038581), (24875, 808945), (26095, 771125), (30845, 652375), (38375, 524365), (47585, 422875), (61093, 329375), (65875, 305465), (84575, 237925), (104873, 191875), (124375, 161789), (130475, 154225)]