20729880

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{647}}^1$

素因数の和:753

約数の個数: 96

約数和(自身を含む): 68234400

約数和(自身を除く): 47504520

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 72, 89, 90, 120, 178, 180, 267, 356, 360, 445, 534, 647, 712, 801, 890, 1068, 1294, 1335, 1602, 1780, 1941, 2136, 2588, 2670, 3204, 3235, 3560, 3882, 4005, 5176, 5340, 5823, 6408, 6470, 7764, 8010, 9705, 10680, 11646, 12940, 15528, 16020, 19410, 23292, 25880, 29115, 32040, 38820, 46584, 57583, 58230, 77640, 115166, 116460, 172749, 230332, 232920, 287915, 345498, 460664, 518247, 575830, 690996, 863745, 1036494, 1151660, 1381992, 1727490, 2072988, 2303320, 2591235, 3454980, 4145976, 5182470, 6909960, 10364940, 20729880]

約数ペア:

[(1, 20729880), (2, 10364940), (3, 6909960), (4, 5182470), (5, 4145976), (6, 3454980), (8, 2591235), (9, 2303320), (10, 2072988), (12, 1727490), (15, 1381992), (18, 1151660), (20, 1036494), (24, 863745), (30, 690996), (36, 575830), (40, 518247), (45, 460664), (60, 345498), (72, 287915), (89, 232920), (90, 230332), (120, 172749), (178, 116460), (180, 115166), (267, 77640), (356, 58230), (360, 57583), (445, 46584), (534, 38820), (647, 32040), (712, 29115), (801, 25880), (890, 23292), (1068, 19410), (1294, 16020), (1335, 15528), (1602, 12940), (1780, 11646), (1941, 10680), (2136, 9705), (2588, 8010), (2670, 7764), (3204, 6470), (3235, 6408), (3560, 5823), (3882, 5340), (4005, 5176)]