21145472

素因数分解:

$2^7\times {\mathrm{31}}^1\times {\mathrm{73}}^2$

素因数の和:191

約数の個数: 48

約数和(自身を含む): 44088480

約数和(自身を除く): 22943008

約数列:

[1, 2, 4, 8, 16, 31, 32, 62, 64, 73, 124, 128, 146, 248, 292, 496, 584, 992, 1168, 1984, 2263, 2336, 3968, 4526, 4672, 5329, 9052, 9344, 10658, 18104, 21316, 36208, 42632, 72416, 85264, 144832, 165199, 170528, 289664, 330398, 341056, 660796, 682112, 1321592, 2643184, 5286368, 10572736, 21145472]

約数ペア:

[(1, 21145472), (2, 10572736), (4, 5286368), (8, 2643184), (16, 1321592), (31, 682112), (32, 660796), (62, 341056), (64, 330398), (73, 289664), (124, 170528), (128, 165199), (146, 144832), (248, 85264), (292, 72416), (496, 42632), (584, 36208), (992, 21316), (1168, 18104), (1984, 10658), (2263, 9344), (2336, 9052), (3968, 5329), (4526, 4672)]