21643980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{181}}^1\times {\mathrm{1993}}^1$

素因数の和:2186

約数の個数: 48

約数和(自身を含む): 60968544

約数和(自身を除く): 39324564

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 181, 362, 543, 724, 905, 1086, 1810, 1993, 2172, 2715, 3620, 3986, 5430, 5979, 7972, 9965, 10860, 11958, 19930, 23916, 29895, 39860, 59790, 119580, 360733, 721466, 1082199, 1442932, 1803665, 2164398, 3607330, 4328796, 5410995, 7214660, 10821990, 21643980]

約数ペア:

[(1, 21643980), (2, 10821990), (3, 7214660), (4, 5410995), (5, 4328796), (6, 3607330), (10, 2164398), (12, 1803665), (15, 1442932), (20, 1082199), (30, 721466), (60, 360733), (181, 119580), (362, 59790), (543, 39860), (724, 29895), (905, 23916), (1086, 19930), (1810, 11958), (1993, 10860), (2172, 9965), (2715, 7972), (3620, 5979), (3986, 5430)]