426400

素因数分解:

$2^5\times 5^2\times {\mathrm{13}}^1\times {\mathrm{41}}^1$

素因数の和:74

約数の個数: 72

約数和(自身を含む): 1148364

約数和(自身を除く): 721964

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 25, 26, 32, 40, 41, 50, 52, 65, 80, 82, 100, 104, 130, 160, 164, 200, 205, 208, 260, 325, 328, 400, 410, 416, 520, 533, 650, 656, 800, 820, 1025, 1040, 1066, 1300, 1312, 1640, 2050, 2080, 2132, 2600, 2665, 3280, 4100, 4264, 5200, 5330, 6560, 8200, 8528, 10400, 10660, 13325, 16400, 17056, 21320, 26650, 32800, 42640, 53300, 85280, 106600, 213200, 426400]

約数ペア:

[(1, 426400), (2, 213200), (4, 106600), (5, 85280), (8, 53300), (10, 42640), (13, 32800), (16, 26650), (20, 21320), (25, 17056), (26, 16400), (32, 13325), (40, 10660), (41, 10400), (50, 8528), (52, 8200), (65, 6560), (80, 5330), (82, 5200), (100, 4264), (104, 4100), (130, 3280), (160, 2665), (164, 2600), (200, 2132), (205, 2080), (208, 2050), (260, 1640), (325, 1312), (328, 1300), (400, 1066), (410, 1040), (416, 1025), (520, 820), (533, 800), (650, 656)]