20986160

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1187}}^1$

素因数の和:1230

約数の個数: 80

約数和(自身を含む): 55683936

約数和(自身を除く): 34697776

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 170, 208, 221, 260, 272, 340, 442, 520, 680, 884, 1040, 1105, 1187, 1360, 1768, 2210, 2374, 3536, 4420, 4748, 5935, 8840, 9496, 11870, 15431, 17680, 18992, 20179, 23740, 30862, 40358, 47480, 61724, 77155, 80716, 94960, 100895, 123448, 154310, 161432, 201790, 246896, 262327, 308620, 322864, 403580, 524654, 617240, 807160, 1049308, 1234480, 1311635, 1614320, 2098616, 2623270, 4197232, 5246540, 10493080, 20986160]

約数ペア:

[(1, 20986160), (2, 10493080), (4, 5246540), (5, 4197232), (8, 2623270), (10, 2098616), (13, 1614320), (16, 1311635), (17, 1234480), (20, 1049308), (26, 807160), (34, 617240), (40, 524654), (52, 403580), (65, 322864), (68, 308620), (80, 262327), (85, 246896), (104, 201790), (130, 161432), (136, 154310), (170, 123448), (208, 100895), (221, 94960), (260, 80716), (272, 77155), (340, 61724), (442, 47480), (520, 40358), (680, 30862), (884, 23740), (1040, 20179), (1105, 18992), (1187, 17680), (1360, 15431), (1768, 11870), (2210, 9496), (2374, 8840), (3536, 5935), (4420, 4748)]