21163920

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{541}}^1$

素因数の和:720

約数の個数: 80

約数和(自身を含む): 66132672

約数和(自身を除く): 44968752

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 163, 240, 326, 489, 541, 652, 815, 978, 1082, 1304, 1623, 1630, 1956, 2164, 2445, 2608, 2705, 3246, 3260, 3912, 4328, 4890, 5410, 6492, 6520, 7824, 8115, 8656, 9780, 10820, 12984, 13040, 16230, 19560, 21640, 25968, 32460, 39120, 43280, 64920, 88183, 129840, 176366, 264549, 352732, 440915, 529098, 705464, 881830, 1058196, 1322745, 1410928, 1763660, 2116392, 2645490, 3527320, 4232784, 5290980, 7054640, 10581960, 21163920]

約数ペア:

[(1, 21163920), (2, 10581960), (3, 7054640), (4, 5290980), (5, 4232784), (6, 3527320), (8, 2645490), (10, 2116392), (12, 1763660), (15, 1410928), (16, 1322745), (20, 1058196), (24, 881830), (30, 705464), (40, 529098), (48, 440915), (60, 352732), (80, 264549), (120, 176366), (163, 129840), (240, 88183), (326, 64920), (489, 43280), (541, 39120), (652, 32460), (815, 25968), (978, 21640), (1082, 19560), (1304, 16230), (1623, 13040), (1630, 12984), (1956, 10820), (2164, 9780), (2445, 8656), (2608, 8115), (2705, 7824), (3246, 6520), (3260, 6492), (3912, 5410), (4328, 4890)]