21273876

素因数分解:

$2^2\times 3^2\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{347}}^1$

素因数の和:501

約数の個数: 72

約数和(自身を含む): 58522464

約数和(自身を除く): 37248588

約数列:

[1, 2, 3, 4, 6, 9, 12, 13, 18, 26, 36, 39, 52, 78, 117, 131, 156, 234, 262, 347, 393, 468, 524, 694, 786, 1041, 1179, 1388, 1572, 1703, 2082, 2358, 3123, 3406, 4164, 4511, 4716, 5109, 6246, 6812, 9022, 10218, 12492, 13533, 15327, 18044, 20436, 27066, 30654, 40599, 45457, 54132, 61308, 81198, 90914, 136371, 162396, 181828, 272742, 409113, 545484, 590941, 818226, 1181882, 1636452, 1772823, 2363764, 3545646, 5318469, 7091292, 10636938, 21273876]

約数ペア:

[(1, 21273876), (2, 10636938), (3, 7091292), (4, 5318469), (6, 3545646), (9, 2363764), (12, 1772823), (13, 1636452), (18, 1181882), (26, 818226), (36, 590941), (39, 545484), (52, 409113), (78, 272742), (117, 181828), (131, 162396), (156, 136371), (234, 90914), (262, 81198), (347, 61308), (393, 54132), (468, 45457), (524, 40599), (694, 30654), (786, 27066), (1041, 20436), (1179, 18044), (1388, 15327), (1572, 13533), (1703, 12492), (2082, 10218), (2358, 9022), (3123, 6812), (3406, 6246), (4164, 5109), (4511, 4716)]