25980880

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{89}}^2$

素因数の和:232

約数の個数: 60

約数和(自身を含む): 62581932

約数和(自身を除く): 36601052

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 89, 164, 178, 205, 328, 356, 410, 445, 656, 712, 820, 890, 1424, 1640, 1780, 3280, 3560, 3649, 7120, 7298, 7921, 14596, 15842, 18245, 29192, 31684, 36490, 39605, 58384, 63368, 72980, 79210, 126736, 145960, 158420, 291920, 316840, 324761, 633680, 649522, 1299044, 1623805, 2598088, 3247610, 5196176, 6495220, 12990440, 25980880]

約数ペア:

[(1, 25980880), (2, 12990440), (4, 6495220), (5, 5196176), (8, 3247610), (10, 2598088), (16, 1623805), (20, 1299044), (40, 649522), (41, 633680), (80, 324761), (82, 316840), (89, 291920), (164, 158420), (178, 145960), (205, 126736), (328, 79210), (356, 72980), (410, 63368), (445, 58384), (656, 39605), (712, 36490), (820, 31684), (890, 29192), (1424, 18245), (1640, 15842), (1780, 14596), (3280, 7921), (3560, 7298), (3649, 7120)]