19955325

素因数分解:

$3^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{211}}^1$

素因数の和:334

約数の個数: 48

約数和(自身を含む): 36067136

約数和(自身を除く): 16111811

約数列:

[1, 3, 5, 13, 15, 25, 39, 65, 75, 97, 195, 211, 291, 325, 485, 633, 975, 1055, 1261, 1455, 2425, 2743, 3165, 3783, 5275, 6305, 7275, 8229, 13715, 15825, 18915, 20467, 31525, 41145, 61401, 68575, 94575, 102335, 205725, 266071, 307005, 511675, 798213, 1330355, 1535025, 3991065, 6651775, 19955325]

約数ペア:

[(1, 19955325), (3, 6651775), (5, 3991065), (13, 1535025), (15, 1330355), (25, 798213), (39, 511675), (65, 307005), (75, 266071), (97, 205725), (195, 102335), (211, 94575), (291, 68575), (325, 61401), (485, 41145), (633, 31525), (975, 20467), (1055, 18915), (1261, 15825), (1455, 13715), (2425, 8229), (2743, 7275), (3165, 6305), (3783, 5275)]