19702878

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{101}}^1$

素因数の和:221

約数の個数: 64

約数和(自身を含む): 44622144

約数和(自身を除く): 24919266

約数列:

[1, 2, 3, 6, 13, 26, 39, 41, 61, 78, 82, 101, 122, 123, 183, 202, 246, 303, 366, 533, 606, 793, 1066, 1313, 1586, 1599, 2379, 2501, 2626, 3198, 3939, 4141, 4758, 5002, 6161, 7503, 7878, 8282, 12322, 12423, 15006, 18483, 24846, 32513, 36966, 53833, 65026, 80093, 97539, 107666, 160186, 161499, 195078, 240279, 252601, 322998, 480558, 505202, 757803, 1515606, 3283813, 6567626, 9851439, 19702878]

約数ペア:

[(1, 19702878), (2, 9851439), (3, 6567626), (6, 3283813), (13, 1515606), (26, 757803), (39, 505202), (41, 480558), (61, 322998), (78, 252601), (82, 240279), (101, 195078), (122, 161499), (123, 160186), (183, 107666), (202, 97539), (246, 80093), (303, 65026), (366, 53833), (533, 36966), (606, 32513), (793, 24846), (1066, 18483), (1313, 15006), (1586, 12423), (1599, 12322), (2379, 8282), (2501, 7878), (2626, 7503), (3198, 6161), (3939, 5002), (4141, 4758)]