20121556

素因数分解:

$2^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:233

約数の個数: 72

約数和(自身を含む): 45246600

約数和(自身を除く): 25125044

約数列:

[1, 2, 4, 7, 13, 14, 26, 28, 49, 52, 53, 91, 98, 106, 149, 182, 196, 212, 298, 364, 371, 596, 637, 689, 742, 1043, 1274, 1378, 1484, 1937, 2086, 2548, 2597, 2756, 3874, 4172, 4823, 5194, 7301, 7748, 7897, 9646, 10388, 13559, 14602, 15794, 19292, 27118, 29204, 31588, 33761, 54236, 55279, 67522, 94913, 102661, 110558, 135044, 189826, 205322, 221116, 379652, 386953, 410644, 718627, 773906, 1437254, 1547812, 2874508, 5030389, 10060778, 20121556]

約数ペア:

[(1, 20121556), (2, 10060778), (4, 5030389), (7, 2874508), (13, 1547812), (14, 1437254), (26, 773906), (28, 718627), (49, 410644), (52, 386953), (53, 379652), (91, 221116), (98, 205322), (106, 189826), (149, 135044), (182, 110558), (196, 102661), (212, 94913), (298, 67522), (364, 55279), (371, 54236), (596, 33761), (637, 31588), (689, 29204), (742, 27118), (1043, 19292), (1274, 15794), (1378, 14602), (1484, 13559), (1937, 10388), (2086, 9646), (2548, 7897), (2597, 7748), (2756, 7301), (3874, 5194), (4172, 4823)]