20872980

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{1901}}^1$

素因数の和:1977

約数の個数: 72

約数和(自身を含む): 64386504

約数和(自身を除く): 43513524

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 61, 90, 122, 180, 183, 244, 305, 366, 549, 610, 732, 915, 1098, 1220, 1830, 1901, 2196, 2745, 3660, 3802, 5490, 5703, 7604, 9505, 10980, 11406, 17109, 19010, 22812, 28515, 34218, 38020, 57030, 68436, 85545, 114060, 115961, 171090, 231922, 342180, 347883, 463844, 579805, 695766, 1043649, 1159610, 1391532, 1739415, 2087298, 2319220, 3478830, 4174596, 5218245, 6957660, 10436490, 20872980]

約数ペア:

[(1, 20872980), (2, 10436490), (3, 6957660), (4, 5218245), (5, 4174596), (6, 3478830), (9, 2319220), (10, 2087298), (12, 1739415), (15, 1391532), (18, 1159610), (20, 1043649), (30, 695766), (36, 579805), (45, 463844), (60, 347883), (61, 342180), (90, 231922), (122, 171090), (180, 115961), (183, 114060), (244, 85545), (305, 68436), (366, 57030), (549, 38020), (610, 34218), (732, 28515), (915, 22812), (1098, 19010), (1220, 17109), (1830, 11406), (1901, 10980), (2196, 9505), (2745, 7604), (3660, 5703), (3802, 5490)]