28012725

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 55269032

約数和(自身を除く): 27256307

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 61, 65, 75, 117, 157, 183, 195, 225, 305, 325, 471, 549, 585, 785, 793, 915, 975, 1413, 1525, 2041, 2355, 2379, 2745, 2925, 3925, 3965, 4575, 6123, 7065, 7137, 9577, 10205, 11775, 11895, 13725, 18369, 19825, 28731, 30615, 35325, 35685, 47885, 51025, 59475, 86193, 91845, 124501, 143655, 153075, 178425, 239425, 373503, 430965, 459225, 622505, 718275, 1120509, 1867515, 2154825, 3112525, 5602545, 9337575, 28012725]

約数ペア:

[(1, 28012725), (3, 9337575), (5, 5602545), (9, 3112525), (13, 2154825), (15, 1867515), (25, 1120509), (39, 718275), (45, 622505), (61, 459225), (65, 430965), (75, 373503), (117, 239425), (157, 178425), (183, 153075), (195, 143655), (225, 124501), (305, 91845), (325, 86193), (471, 59475), (549, 51025), (585, 47885), (785, 35685), (793, 35325), (915, 30615), (975, 28731), (1413, 19825), (1525, 18369), (2041, 13725), (2355, 11895), (2379, 11775), (2745, 10205), (2925, 9577), (3925, 7137), (3965, 7065), (4575, 6123)]