19979940

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{61}}^1\times {\mathrm{103}}^1$

素因数の和:229

約数の個数: 96

約数和(自身を含む): 58496256

約数和(自身を除く): 38516316

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 53, 60, 61, 103, 106, 122, 159, 183, 206, 212, 244, 265, 305, 309, 318, 366, 412, 515, 530, 610, 618, 636, 732, 795, 915, 1030, 1060, 1220, 1236, 1545, 1590, 1830, 2060, 3090, 3180, 3233, 3660, 5459, 6180, 6283, 6466, 9699, 10918, 12566, 12932, 16165, 16377, 18849, 19398, 21836, 25132, 27295, 31415, 32330, 32754, 37698, 38796, 48495, 54590, 62830, 64660, 65508, 75396, 81885, 94245, 96990, 109180, 125660, 163770, 188490, 193980, 327540, 332999, 376980, 665998, 998997, 1331996, 1664995, 1997994, 3329990, 3995988, 4994985, 6659980, 9989970, 19979940]

約数ペア:

[(1, 19979940), (2, 9989970), (3, 6659980), (4, 4994985), (5, 3995988), (6, 3329990), (10, 1997994), (12, 1664995), (15, 1331996), (20, 998997), (30, 665998), (53, 376980), (60, 332999), (61, 327540), (103, 193980), (106, 188490), (122, 163770), (159, 125660), (183, 109180), (206, 96990), (212, 94245), (244, 81885), (265, 75396), (305, 65508), (309, 64660), (318, 62830), (366, 54590), (412, 48495), (515, 38796), (530, 37698), (610, 32754), (618, 32330), (636, 31415), (732, 27295), (795, 25132), (915, 21836), (1030, 19398), (1060, 18849), (1220, 16377), (1236, 16165), (1545, 12932), (1590, 12566), (1830, 10918), (2060, 9699), (3090, 6466), (3180, 6283), (3233, 6180), (3660, 5459)]