20865572

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{431}}^1$

素因数の和:481

約数の個数: 72

約数和(自身を含む): 48263040

約数和(自身を除く): 27397468

約数列:

[1, 2, 4, 7, 13, 14, 19, 26, 28, 38, 49, 52, 76, 91, 98, 133, 182, 196, 247, 266, 364, 431, 494, 532, 637, 862, 931, 988, 1274, 1724, 1729, 1862, 2548, 3017, 3458, 3724, 5603, 6034, 6916, 8189, 11206, 12068, 12103, 16378, 21119, 22412, 24206, 32756, 39221, 42238, 48412, 57323, 78442, 84476, 106457, 114646, 156884, 212914, 229292, 274547, 401261, 425828, 549094, 745199, 802522, 1098188, 1490398, 1605044, 2980796, 5216393, 10432786, 20865572]

約数ペア:

[(1, 20865572), (2, 10432786), (4, 5216393), (7, 2980796), (13, 1605044), (14, 1490398), (19, 1098188), (26, 802522), (28, 745199), (38, 549094), (49, 425828), (52, 401261), (76, 274547), (91, 229292), (98, 212914), (133, 156884), (182, 114646), (196, 106457), (247, 84476), (266, 78442), (364, 57323), (431, 48412), (494, 42238), (532, 39221), (637, 32756), (862, 24206), (931, 22412), (988, 21119), (1274, 16378), (1724, 12103), (1729, 12068), (1862, 11206), (2548, 8189), (3017, 6916), (3458, 6034), (3724, 5603)]