78505780

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1\times {\mathrm{281}}^1$

素因数の和:580

約数の個数: 48

約数和(自身を含む): 168895440

約数和(自身を除く): 90389660

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 229, 244, 281, 305, 458, 562, 610, 916, 1124, 1145, 1220, 1405, 2290, 2810, 4580, 5620, 13969, 17141, 27938, 34282, 55876, 64349, 68564, 69845, 85705, 128698, 139690, 171410, 257396, 279380, 321745, 342820, 643490, 1286980, 3925289, 7850578, 15701156, 19626445, 39252890, 78505780]

約数ペア:

[(1, 78505780), (2, 39252890), (4, 19626445), (5, 15701156), (10, 7850578), (20, 3925289), (61, 1286980), (122, 643490), (229, 342820), (244, 321745), (281, 279380), (305, 257396), (458, 171410), (562, 139690), (610, 128698), (916, 85705), (1124, 69845), (1145, 68564), (1220, 64349), (1405, 55876), (2290, 34282), (2810, 27938), (4580, 17141), (5620, 13969)]