20283990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:277

約数の個数: 64

約数和(自身を含む): 50388480

約数和(自身を除く): 30104490

約数列:

[1, 2, 3, 5, 6, 10, 15, 30, 71, 89, 107, 142, 178, 213, 214, 267, 321, 355, 426, 445, 534, 535, 642, 710, 890, 1065, 1070, 1335, 1605, 2130, 2670, 3210, 6319, 7597, 9523, 12638, 15194, 18957, 19046, 22791, 28569, 31595, 37914, 37985, 45582, 47615, 57138, 63190, 75970, 94785, 95230, 113955, 142845, 189570, 227910, 285690, 676133, 1352266, 2028399, 3380665, 4056798, 6761330, 10141995, 20283990]

約数ペア:

[(1, 20283990), (2, 10141995), (3, 6761330), (5, 4056798), (6, 3380665), (10, 2028399), (15, 1352266), (30, 676133), (71, 285690), (89, 227910), (107, 189570), (142, 142845), (178, 113955), (213, 95230), (214, 94785), (267, 75970), (321, 63190), (355, 57138), (426, 47615), (445, 45582), (534, 37985), (535, 37914), (642, 31595), (710, 28569), (890, 22791), (1065, 19046), (1070, 18957), (1335, 15194), (1605, 12638), (2130, 9523), (2670, 7597), (3210, 6319)]