20681820

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{1291}}^1$

素因数の和:1395

約数の個数: 72

約数和(自身を含む): 63488880

約数和(自身を除く): 42807060

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 89, 90, 178, 180, 267, 356, 445, 534, 801, 890, 1068, 1291, 1335, 1602, 1780, 2582, 2670, 3204, 3873, 4005, 5164, 5340, 6455, 7746, 8010, 11619, 12910, 15492, 16020, 19365, 23238, 25820, 38730, 46476, 58095, 77460, 114899, 116190, 229798, 232380, 344697, 459596, 574495, 689394, 1034091, 1148990, 1378788, 1723485, 2068182, 2297980, 3446970, 4136364, 5170455, 6893940, 10340910, 20681820]

約数ペア:

[(1, 20681820), (2, 10340910), (3, 6893940), (4, 5170455), (5, 4136364), (6, 3446970), (9, 2297980), (10, 2068182), (12, 1723485), (15, 1378788), (18, 1148990), (20, 1034091), (30, 689394), (36, 574495), (45, 459596), (60, 344697), (89, 232380), (90, 229798), (178, 116190), (180, 114899), (267, 77460), (356, 58095), (445, 46476), (534, 38730), (801, 25820), (890, 23238), (1068, 19365), (1291, 16020), (1335, 15492), (1602, 12910), (1780, 11619), (2582, 8010), (2670, 7746), (3204, 6455), (3873, 5340), (4005, 5164)]