20899240

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{257}}^1$

素因数の和:394

約数の個数: 64

約数和(自身を含む): 50155200

約数和(自身を除く): 29255960

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 107, 152, 190, 214, 257, 380, 428, 514, 535, 760, 856, 1028, 1070, 1285, 2033, 2056, 2140, 2570, 4066, 4280, 4883, 5140, 8132, 9766, 10165, 10280, 16264, 19532, 20330, 24415, 27499, 39064, 40660, 48830, 54998, 81320, 97660, 109996, 137495, 195320, 219992, 274990, 522481, 549980, 1044962, 1099960, 2089924, 2612405, 4179848, 5224810, 10449620, 20899240]

約数ペア:

[(1, 20899240), (2, 10449620), (4, 5224810), (5, 4179848), (8, 2612405), (10, 2089924), (19, 1099960), (20, 1044962), (38, 549980), (40, 522481), (76, 274990), (95, 219992), (107, 195320), (152, 137495), (190, 109996), (214, 97660), (257, 81320), (380, 54998), (428, 48830), (514, 40660), (535, 39064), (760, 27499), (856, 24415), (1028, 20330), (1070, 19532), (1285, 16264), (2033, 10280), (2056, 10165), (2140, 9766), (2570, 8132), (4066, 5140), (4280, 4883)]