28395380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{271}}^1$

素因数の和:337

約数の個数: 72

約数和(自身を含む): 66898944

約数和(自身を除く): 38503564

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 260, 271, 310, 338, 403, 542, 620, 676, 806, 845, 1084, 1355, 1612, 1690, 2015, 2710, 3380, 3523, 4030, 5239, 5420, 7046, 8060, 8401, 10478, 14092, 16802, 17615, 20956, 26195, 33604, 35230, 42005, 45799, 52390, 70460, 84010, 91598, 104780, 109213, 168020, 183196, 218426, 228995, 436852, 457990, 546065, 915980, 1092130, 1419769, 2184260, 2839538, 5679076, 7098845, 14197690, 28395380]

約数ペア:

[(1, 28395380), (2, 14197690), (4, 7098845), (5, 5679076), (10, 2839538), (13, 2184260), (20, 1419769), (26, 1092130), (31, 915980), (52, 546065), (62, 457990), (65, 436852), (124, 228995), (130, 218426), (155, 183196), (169, 168020), (260, 109213), (271, 104780), (310, 91598), (338, 84010), (403, 70460), (542, 52390), (620, 45799), (676, 42005), (806, 35230), (845, 33604), (1084, 26195), (1355, 20956), (1612, 17615), (1690, 16802), (2015, 14092), (2710, 10478), (3380, 8401), (3523, 8060), (4030, 7046), (5239, 5420)]