21397455

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1$

素因数の和:276

約数の個数: 48

約数和(自身を含む): 38697984

約数和(自身を除く): 17300529

約数列:

[1, 3, 5, 9, 15, 45, 47, 67, 141, 151, 201, 235, 335, 423, 453, 603, 705, 755, 1005, 1359, 2115, 2265, 3015, 3149, 6795, 7097, 9447, 10117, 15745, 21291, 28341, 30351, 35485, 47235, 50585, 63873, 91053, 106455, 141705, 151755, 319365, 455265, 475499, 1426497, 2377495, 4279491, 7132485, 21397455]

約数ペア:

[(1, 21397455), (3, 7132485), (5, 4279491), (9, 2377495), (15, 1426497), (45, 475499), (47, 455265), (67, 319365), (141, 151755), (151, 141705), (201, 106455), (235, 91053), (335, 63873), (423, 50585), (453, 47235), (603, 35485), (705, 30351), (755, 28341), (1005, 21291), (1359, 15745), (2115, 10117), (2265, 9447), (3015, 7097), (3149, 6795)]