21720450

素因数分解:

$2^1\times 3^1\times 5^2\times {\mathrm{89}}^1\times {\mathrm{1627}}^1$

素因数の和:1731

約数の個数: 48

約数和(自身を含む): 54505440

約数和(自身を除く): 32784990

約数列:

[1, 2, 3, 5, 6, 10, 15, 25, 30, 50, 75, 89, 150, 178, 267, 445, 534, 890, 1335, 1627, 2225, 2670, 3254, 4450, 4881, 6675, 8135, 9762, 13350, 16270, 24405, 40675, 48810, 81350, 122025, 144803, 244050, 289606, 434409, 724015, 868818, 1448030, 2172045, 3620075, 4344090, 7240150, 10860225, 21720450]

約数ペア:

[(1, 21720450), (2, 10860225), (3, 7240150), (5, 4344090), (6, 3620075), (10, 2172045), (15, 1448030), (25, 868818), (30, 724015), (50, 434409), (75, 289606), (89, 244050), (150, 144803), (178, 122025), (267, 81350), (445, 48810), (534, 40675), (890, 24405), (1335, 16270), (1627, 13350), (2225, 9762), (2670, 8135), (3254, 6675), (4450, 4881)]