720945920

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{18169}}^1$

素因数の和:18221

約数の個数: 72

約数和(自身を含む): 1782695040

約数和(自身を除く): 1061749120

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, 620, 640, 992, 1240, 1280, 1984, 2480, 3968, 4960, 7936, 9920, 18169, 19840, 36338, 39680, 72676, 90845, 145352, 181690, 290704, 363380, 563239, 581408, 726760, 1126478, 1162816, 1453520, 2252956, 2325632, 2816195, 2907040, 4505912, 4651264, 5632390, 5814080, 9011824, 11264780, 11628160, 18023648, 22529560, 23256320, 36047296, 45059120, 72094592, 90118240, 144189184, 180236480, 360472960, 720945920]

約数ペア:

[(1, 720945920), (2, 360472960), (4, 180236480), (5, 144189184), (8, 90118240), (10, 72094592), (16, 45059120), (20, 36047296), (31, 23256320), (32, 22529560), (40, 18023648), (62, 11628160), (64, 11264780), (80, 9011824), (124, 5814080), (128, 5632390), (155, 4651264), (160, 4505912), (248, 2907040), (256, 2816195), (310, 2325632), (320, 2252956), (496, 1453520), (620, 1162816), (640, 1126478), (992, 726760), (1240, 581408), (1280, 563239), (1984, 363380), (2480, 290704), (3968, 181690), (4960, 145352), (7936, 90845), (9920, 72676), (18169, 39680), (19840, 36338)]