256914920

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{1483}}^1$

素因数の和:1626

約数の個数: 64

約数和(自身を含む): 596211840

約数和(自身を除く): 339296920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 71, 122, 142, 244, 284, 305, 355, 488, 568, 610, 710, 1220, 1420, 1483, 2440, 2840, 2966, 4331, 5932, 7415, 8662, 11864, 14830, 17324, 21655, 29660, 34648, 43310, 59320, 86620, 90463, 105293, 173240, 180926, 210586, 361852, 421172, 452315, 526465, 723704, 842344, 904630, 1052930, 1809260, 2105860, 3618520, 4211720, 6422873, 12845746, 25691492, 32114365, 51382984, 64228730, 128457460, 256914920]

約数ペア:

[(1, 256914920), (2, 128457460), (4, 64228730), (5, 51382984), (8, 32114365), (10, 25691492), (20, 12845746), (40, 6422873), (61, 4211720), (71, 3618520), (122, 2105860), (142, 1809260), (244, 1052930), (284, 904630), (305, 842344), (355, 723704), (488, 526465), (568, 452315), (610, 421172), (710, 361852), (1220, 210586), (1420, 180926), (1483, 173240), (2440, 105293), (2840, 90463), (2966, 86620), (4331, 59320), (5932, 43310), (7415, 34648), (8662, 29660), (11864, 21655), (14830, 17324)]