261808640

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{3299}}^1$

素因数の和:3353

約数の個数: 80

約数和(自身を含む): 648172800

約数和(自身を除く): 386364160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 512, 620, 640, 992, 1240, 1280, 1984, 2480, 2560, 3299, 3968, 4960, 6598, 7936, 9920, 13196, 15872, 16495, 19840, 26392, 32990, 39680, 52784, 65980, 79360, 102269, 105568, 131960, 204538, 211136, 263920, 409076, 422272, 511345, 527840, 818152, 844544, 1022690, 1055680, 1636304, 1689088, 2045380, 2111360, 3272608, 4090760, 4222720, 6545216, 8181520, 8445440, 13090432, 16363040, 26180864, 32726080, 52361728, 65452160, 130904320, 261808640]

約数ペア:

[(1, 261808640), (2, 130904320), (4, 65452160), (5, 52361728), (8, 32726080), (10, 26180864), (16, 16363040), (20, 13090432), (31, 8445440), (32, 8181520), (40, 6545216), (62, 4222720), (64, 4090760), (80, 3272608), (124, 2111360), (128, 2045380), (155, 1689088), (160, 1636304), (248, 1055680), (256, 1022690), (310, 844544), (320, 818152), (496, 527840), (512, 511345), (620, 422272), (640, 409076), (992, 263920), (1240, 211136), (1280, 204538), (1984, 131960), (2480, 105568), (2560, 102269), (3299, 79360), (3968, 65980), (4960, 52784), (6598, 39680), (7936, 32990), (9920, 26392), (13196, 19840), (15872, 16495)]