20740916

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{89}}^1$

素因数の和:177

約数の個数: 72

約数和(自身を含む): 45246600

約数和(自身を除く): 24505684

約数列:

[1, 2, 4, 7, 14, 28, 29, 41, 49, 58, 82, 89, 98, 116, 164, 178, 196, 203, 287, 356, 406, 574, 623, 812, 1148, 1189, 1246, 1421, 2009, 2378, 2492, 2581, 2842, 3649, 4018, 4361, 4756, 5162, 5684, 7298, 8036, 8323, 8722, 10324, 14596, 16646, 17444, 18067, 25543, 33292, 36134, 51086, 58261, 72268, 102172, 105821, 116522, 126469, 178801, 211642, 233044, 252938, 357602, 423284, 505876, 715204, 740747, 1481494, 2962988, 5185229, 10370458, 20740916]

約数ペア:

[(1, 20740916), (2, 10370458), (4, 5185229), (7, 2962988), (14, 1481494), (28, 740747), (29, 715204), (41, 505876), (49, 423284), (58, 357602), (82, 252938), (89, 233044), (98, 211642), (116, 178801), (164, 126469), (178, 116522), (196, 105821), (203, 102172), (287, 72268), (356, 58261), (406, 51086), (574, 36134), (623, 33292), (812, 25543), (1148, 18067), (1189, 17444), (1246, 16646), (1421, 14596), (2009, 10324), (2378, 8722), (2492, 8323), (2581, 8036), (2842, 7298), (3649, 5684), (4018, 5162), (4361, 4756)]