25251980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:307

約数の個数: 72

約数和(自身を含む): 59520384

約数和(自身を除く): 34268404

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 31, 52, 62, 65, 124, 130, 155, 169, 241, 260, 310, 338, 403, 482, 620, 676, 806, 845, 964, 1205, 1612, 1690, 2015, 2410, 3133, 3380, 4030, 4820, 5239, 6266, 7471, 8060, 10478, 12532, 14942, 15665, 20956, 26195, 29884, 31330, 37355, 40729, 52390, 62660, 74710, 81458, 97123, 104780, 149420, 162916, 194246, 203645, 388492, 407290, 485615, 814580, 971230, 1262599, 1942460, 2525198, 5050396, 6312995, 12625990, 25251980]

約数ペア:

[(1, 25251980), (2, 12625990), (4, 6312995), (5, 5050396), (10, 2525198), (13, 1942460), (20, 1262599), (26, 971230), (31, 814580), (52, 485615), (62, 407290), (65, 388492), (124, 203645), (130, 194246), (155, 162916), (169, 149420), (241, 104780), (260, 97123), (310, 81458), (338, 74710), (403, 62660), (482, 52390), (620, 40729), (676, 37355), (806, 31330), (845, 29884), (964, 26195), (1205, 20956), (1612, 15665), (1690, 14942), (2015, 12532), (2410, 10478), (3133, 8060), (3380, 7471), (4030, 6266), (4820, 5239)]