21218160

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{211}}^1\times {\mathrm{419}}^1$

素因数の和:646

約数の個数: 80

約数和(自身を含む): 66245760

約数和(自身を除く): 45027600

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 211, 240, 419, 422, 633, 838, 844, 1055, 1257, 1266, 1676, 1688, 2095, 2110, 2514, 2532, 3165, 3352, 3376, 4190, 4220, 5028, 5064, 6285, 6330, 6704, 8380, 8440, 10056, 10128, 12570, 12660, 16760, 16880, 20112, 25140, 25320, 33520, 50280, 50640, 88409, 100560, 176818, 265227, 353636, 442045, 530454, 707272, 884090, 1060908, 1326135, 1414544, 1768180, 2121816, 2652270, 3536360, 4243632, 5304540, 7072720, 10609080, 21218160]

約数ペア:

[(1, 21218160), (2, 10609080), (3, 7072720), (4, 5304540), (5, 4243632), (6, 3536360), (8, 2652270), (10, 2121816), (12, 1768180), (15, 1414544), (16, 1326135), (20, 1060908), (24, 884090), (30, 707272), (40, 530454), (48, 442045), (60, 353636), (80, 265227), (120, 176818), (211, 100560), (240, 88409), (419, 50640), (422, 50280), (633, 33520), (838, 25320), (844, 25140), (1055, 20112), (1257, 16880), (1266, 16760), (1676, 12660), (1688, 12570), (2095, 10128), (2110, 10056), (2514, 8440), (2532, 8380), (3165, 6704), (3352, 6330), (3376, 6285), (4190, 5064), (4220, 5028)]