20502915940

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{241}}^1\times {\mathrm{327209}}^1$

素因数の和:327472

約数の個数: 48

約数和(自身を含む): 46560674160

約数和(自身を除く): 26057758220

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 241, 260, 482, 964, 1205, 2410, 3133, 4820, 6266, 12532, 15665, 31330, 62660, 327209, 654418, 1308836, 1636045, 3272090, 4253717, 6544180, 8507434, 17014868, 21268585, 42537170, 78857369, 85074340, 157714738, 315429476, 394286845, 788573690, 1025145797, 1577147380, 2050291594, 4100583188, 5125728985, 10251457970, 20502915940]

約数ペア:

[(1, 20502915940), (2, 10251457970), (4, 5125728985), (5, 4100583188), (10, 2050291594), (13, 1577147380), (20, 1025145797), (26, 788573690), (52, 394286845), (65, 315429476), (130, 157714738), (241, 85074340), (260, 78857369), (482, 42537170), (964, 21268585), (1205, 17014868), (2410, 8507434), (3133, 6544180), (4820, 4253717), (6266, 3272090), (12532, 1636045), (15665, 1308836), (31330, 654418), (62660, 327209)]