21234980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1$

素因数の和:165

約数の個数: 96

約数和(自身を含む): 51819264

約数和(自身を除く): 30584284

約数列:

[1, 2, 4, 5, 10, 13, 20, 23, 26, 46, 52, 53, 65, 67, 92, 106, 115, 130, 134, 212, 230, 260, 265, 268, 299, 335, 460, 530, 598, 670, 689, 871, 1060, 1196, 1219, 1340, 1378, 1495, 1541, 1742, 2438, 2756, 2990, 3082, 3445, 3484, 3551, 4355, 4876, 5980, 6095, 6164, 6890, 7102, 7705, 8710, 12190, 13780, 14204, 15410, 15847, 17420, 17755, 20033, 24380, 30820, 31694, 35510, 40066, 46163, 63388, 71020, 79235, 80132, 81673, 92326, 100165, 158470, 163346, 184652, 200330, 230815, 316940, 326692, 400660, 408365, 461630, 816730, 923260, 1061749, 1633460, 2123498, 4246996, 5308745, 10617490, 21234980]

約数ペア:

[(1, 21234980), (2, 10617490), (4, 5308745), (5, 4246996), (10, 2123498), (13, 1633460), (20, 1061749), (23, 923260), (26, 816730), (46, 461630), (52, 408365), (53, 400660), (65, 326692), (67, 316940), (92, 230815), (106, 200330), (115, 184652), (130, 163346), (134, 158470), (212, 100165), (230, 92326), (260, 81673), (265, 80132), (268, 79235), (299, 71020), (335, 63388), (460, 46163), (530, 40066), (598, 35510), (670, 31694), (689, 30820), (871, 24380), (1060, 20033), (1196, 17755), (1219, 17420), (1340, 15847), (1378, 15410), (1495, 14204), (1541, 13780), (1742, 12190), (2438, 8710), (2756, 7705), (2990, 7102), (3082, 6890), (3445, 6164), (3484, 6095), (3551, 5980), (4355, 4876)]