21970845

素因数分解:

$3^5\times 5^1\times {\mathrm{13}}^2\times {\mathrm{107}}^1$

素因数の和:153

約数の個数: 72

約数和(自身を含む): 43164576

約数和(自身を除く): 21193731

約数列:

[1, 3, 5, 9, 13, 15, 27, 39, 45, 65, 81, 107, 117, 135, 169, 195, 243, 321, 351, 405, 507, 535, 585, 845, 963, 1053, 1215, 1391, 1521, 1605, 1755, 2535, 2889, 3159, 4173, 4563, 4815, 5265, 6955, 7605, 8667, 12519, 13689, 14445, 15795, 18083, 20865, 22815, 26001, 37557, 41067, 43335, 54249, 62595, 68445, 90415, 112671, 130005, 162747, 187785, 205335, 271245, 338013, 488241, 563355, 813735, 1464723, 1690065, 2441205, 4394169, 7323615, 21970845]

約数ペア:

[(1, 21970845), (3, 7323615), (5, 4394169), (9, 2441205), (13, 1690065), (15, 1464723), (27, 813735), (39, 563355), (45, 488241), (65, 338013), (81, 271245), (107, 205335), (117, 187785), (135, 162747), (169, 130005), (195, 112671), (243, 90415), (321, 68445), (351, 62595), (405, 54249), (507, 43335), (535, 41067), (585, 37557), (845, 26001), (963, 22815), (1053, 20865), (1215, 18083), (1391, 15795), (1521, 14445), (1605, 13689), (1755, 12519), (2535, 8667), (2889, 7605), (3159, 6955), (4173, 5265), (4563, 4815)]