20115720

素因数分解:

$2^3\times 3^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{787}}^1$

素因数の和:875

約数の個数: 96

約数和(自身を含む): 66381120

約数和(自身を除く): 46265400

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 30, 36, 40, 45, 60, 71, 72, 90, 120, 142, 180, 213, 284, 355, 360, 426, 568, 639, 710, 787, 852, 1065, 1278, 1420, 1574, 1704, 2130, 2361, 2556, 2840, 3148, 3195, 3935, 4260, 4722, 5112, 6296, 6390, 7083, 7870, 8520, 9444, 11805, 12780, 14166, 15740, 18888, 23610, 25560, 28332, 31480, 35415, 47220, 55877, 56664, 70830, 94440, 111754, 141660, 167631, 223508, 279385, 283320, 335262, 447016, 502893, 558770, 670524, 838155, 1005786, 1117540, 1341048, 1676310, 2011572, 2235080, 2514465, 3352620, 4023144, 5028930, 6705240, 10057860, 20115720]

約数ペア:

[(1, 20115720), (2, 10057860), (3, 6705240), (4, 5028930), (5, 4023144), (6, 3352620), (8, 2514465), (9, 2235080), (10, 2011572), (12, 1676310), (15, 1341048), (18, 1117540), (20, 1005786), (24, 838155), (30, 670524), (36, 558770), (40, 502893), (45, 447016), (60, 335262), (71, 283320), (72, 279385), (90, 223508), (120, 167631), (142, 141660), (180, 111754), (213, 94440), (284, 70830), (355, 56664), (360, 55877), (426, 47220), (568, 35415), (639, 31480), (710, 28332), (787, 25560), (852, 23610), (1065, 18888), (1278, 15740), (1420, 14166), (1574, 12780), (1704, 11805), (2130, 9444), (2361, 8520), (2556, 7870), (2840, 7083), (3148, 6390), (3195, 6296), (3935, 5112), (4260, 4722)]