639864784

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{131}}^1\times {\mathrm{1021}}^1$

素因数の和:1196

約数の個数: 80

約数和(自身を含む): 1405160064

約数和(自身を除く): 765295280

約数列:

[1, 2, 4, 8, 13, 16, 23, 26, 46, 52, 92, 104, 131, 184, 208, 262, 299, 368, 524, 598, 1021, 1048, 1196, 1703, 2042, 2096, 2392, 3013, 3406, 4084, 4784, 6026, 6812, 8168, 12052, 13273, 13624, 16336, 23483, 24104, 26546, 27248, 39169, 46966, 48208, 53092, 78338, 93932, 106184, 133751, 156676, 187864, 212368, 267502, 305279, 313352, 375728, 535004, 610558, 626704, 1070008, 1221116, 1738763, 2140016, 2442232, 3076273, 3477526, 4884464, 6152546, 6955052, 12305092, 13910104, 24610184, 27820208, 39991549, 49220368, 79983098, 159966196, 319932392, 639864784]

約数ペア:

[(1, 639864784), (2, 319932392), (4, 159966196), (8, 79983098), (13, 49220368), (16, 39991549), (23, 27820208), (26, 24610184), (46, 13910104), (52, 12305092), (92, 6955052), (104, 6152546), (131, 4884464), (184, 3477526), (208, 3076273), (262, 2442232), (299, 2140016), (368, 1738763), (524, 1221116), (598, 1070008), (1021, 626704), (1048, 610558), (1196, 535004), (1703, 375728), (2042, 313352), (2096, 305279), (2392, 267502), (3013, 212368), (3406, 187864), (4084, 156676), (4784, 133751), (6026, 106184), (6812, 93932), (8168, 78338), (12052, 53092), (13273, 48208), (13624, 46966), (16336, 39169), (23483, 27248), (24104, 26546)]