21208980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{27191}}^1$

素因数の和:27216

約数の個数: 48

約数和(自身を含む): 63955584

約数和(自身を除く): 42746604

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780, 27191, 54382, 81573, 108764, 135955, 163146, 271910, 326292, 353483, 407865, 543820, 706966, 815730, 1060449, 1413932, 1631460, 1767415, 2120898, 3534830, 4241796, 5302245, 7069660, 10604490, 21208980]

約数ペア:

[(1, 21208980), (2, 10604490), (3, 7069660), (4, 5302245), (5, 4241796), (6, 3534830), (10, 2120898), (12, 1767415), (13, 1631460), (15, 1413932), (20, 1060449), (26, 815730), (30, 706966), (39, 543820), (52, 407865), (60, 353483), (65, 326292), (78, 271910), (130, 163146), (156, 135955), (195, 108764), (260, 81573), (390, 54382), (780, 27191)]