21451860

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{3221}}^1$

素因数の和:3273

約数の個数: 72

約数和(自身を含む): 66850056

約数和(自身を除く): 45398196

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 37, 45, 60, 74, 90, 111, 148, 180, 185, 222, 333, 370, 444, 555, 666, 740, 1110, 1332, 1665, 2220, 3221, 3330, 6442, 6660, 9663, 12884, 16105, 19326, 28989, 32210, 38652, 48315, 57978, 64420, 96630, 115956, 119177, 144945, 193260, 238354, 289890, 357531, 476708, 579780, 595885, 715062, 1072593, 1191770, 1430124, 1787655, 2145186, 2383540, 3575310, 4290372, 5362965, 7150620, 10725930, 21451860]

約数ペア:

[(1, 21451860), (2, 10725930), (3, 7150620), (4, 5362965), (5, 4290372), (6, 3575310), (9, 2383540), (10, 2145186), (12, 1787655), (15, 1430124), (18, 1191770), (20, 1072593), (30, 715062), (36, 595885), (37, 579780), (45, 476708), (60, 357531), (74, 289890), (90, 238354), (111, 193260), (148, 144945), (180, 119177), (185, 115956), (222, 96630), (333, 64420), (370, 57978), (444, 48315), (555, 38652), (666, 32210), (740, 28989), (1110, 19326), (1332, 16105), (1665, 12884), (2220, 9663), (3221, 6660), (3330, 6442)]