641191720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{72533}}^1$

素因数の和:72574

約数の個数: 64

約数和(自身を含む): 1645071120

約数和(自身を除く): 1003879400

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 52, 65, 68, 85, 104, 130, 136, 170, 221, 260, 340, 442, 520, 680, 884, 1105, 1768, 2210, 4420, 8840, 72533, 145066, 290132, 362665, 580264, 725330, 942929, 1233061, 1450660, 1885858, 2466122, 2901320, 3771716, 4714645, 4932244, 6165305, 7543432, 9429290, 9864488, 12330610, 16029793, 18858580, 24661220, 32059586, 37717160, 49322440, 64119172, 80148965, 128238344, 160297930, 320595860, 641191720]

約数ペア:

[(1, 641191720), (2, 320595860), (4, 160297930), (5, 128238344), (8, 80148965), (10, 64119172), (13, 49322440), (17, 37717160), (20, 32059586), (26, 24661220), (34, 18858580), (40, 16029793), (52, 12330610), (65, 9864488), (68, 9429290), (85, 7543432), (104, 6165305), (130, 4932244), (136, 4714645), (170, 3771716), (221, 2901320), (260, 2466122), (340, 1885858), (442, 1450660), (520, 1233061), (680, 942929), (884, 725330), (1105, 580264), (1768, 362665), (2210, 290132), (4420, 145066), (8840, 72533)]