21184720

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{421}}^1$

素因数の和:488

約数の個数: 80

約数和(自身を含む): 53688528

約数和(自身を除く): 32503808

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 37, 40, 68, 74, 80, 85, 136, 148, 170, 185, 272, 296, 340, 370, 421, 592, 629, 680, 740, 842, 1258, 1360, 1480, 1684, 2105, 2516, 2960, 3145, 3368, 4210, 5032, 6290, 6736, 7157, 8420, 10064, 12580, 14314, 15577, 16840, 25160, 28628, 31154, 33680, 35785, 50320, 57256, 62308, 71570, 77885, 114512, 124616, 143140, 155770, 249232, 264809, 286280, 311540, 529618, 572560, 623080, 1059236, 1246160, 1324045, 2118472, 2648090, 4236944, 5296180, 10592360, 21184720]

約数ペア:

[(1, 21184720), (2, 10592360), (4, 5296180), (5, 4236944), (8, 2648090), (10, 2118472), (16, 1324045), (17, 1246160), (20, 1059236), (34, 623080), (37, 572560), (40, 529618), (68, 311540), (74, 286280), (80, 264809), (85, 249232), (136, 155770), (148, 143140), (170, 124616), (185, 114512), (272, 77885), (296, 71570), (340, 62308), (370, 57256), (421, 50320), (592, 35785), (629, 33680), (680, 31154), (740, 28628), (842, 25160), (1258, 16840), (1360, 15577), (1480, 14314), (1684, 12580), (2105, 10064), (2516, 8420), (2960, 7157), (3145, 6736), (3368, 6290), (4210, 5032)]