21721680

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{30169}}^1$

素因数の和:30188

約数の個数: 60

約数和(自身を含む): 72951060

約数和(自身を除く): 51229380

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720, 30169, 60338, 90507, 120676, 150845, 181014, 241352, 271521, 301690, 362028, 452535, 482704, 543042, 603380, 724056, 905070, 1086084, 1206760, 1357605, 1448112, 1810140, 2172168, 2413520, 2715210, 3620280, 4344336, 5430420, 7240560, 10860840, 21721680]

約数ペア:

[(1, 21721680), (2, 10860840), (3, 7240560), (4, 5430420), (5, 4344336), (6, 3620280), (8, 2715210), (9, 2413520), (10, 2172168), (12, 1810140), (15, 1448112), (16, 1357605), (18, 1206760), (20, 1086084), (24, 905070), (30, 724056), (36, 603380), (40, 543042), (45, 482704), (48, 452535), (60, 362028), (72, 301690), (80, 271521), (90, 241352), (120, 181014), (144, 150845), (180, 120676), (240, 90507), (360, 60338), (720, 30169)]