19895980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{1297}}^1$

素因数の和:1378

約数の個数: 48

約数和(自身を含む): 45793440

約数和(自身を除く): 25897460

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 59, 65, 118, 130, 236, 260, 295, 590, 767, 1180, 1297, 1534, 2594, 3068, 3835, 5188, 6485, 7670, 12970, 15340, 16861, 25940, 33722, 67444, 76523, 84305, 153046, 168610, 306092, 337220, 382615, 765230, 994799, 1530460, 1989598, 3979196, 4973995, 9947990, 19895980]

約数ペア:

[(1, 19895980), (2, 9947990), (4, 4973995), (5, 3979196), (10, 1989598), (13, 1530460), (20, 994799), (26, 765230), (52, 382615), (59, 337220), (65, 306092), (118, 168610), (130, 153046), (236, 84305), (260, 76523), (295, 67444), (590, 33722), (767, 25940), (1180, 16861), (1297, 15340), (1534, 12970), (2594, 7670), (3068, 6485), (3835, 5188)]