20129557760

素因数分解:

$2^8\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1209709}}^1$

素因数の和:1209743

約数の個数: 72

約数和(自身を含む): 51925592040

約数和(自身を除く): 31796034280

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 256, 260, 320, 416, 520, 640, 832, 1040, 1280, 1664, 2080, 3328, 4160, 8320, 16640, 1209709, 2419418, 4838836, 6048545, 9677672, 12097090, 15726217, 19355344, 24194180, 31452434, 38710688, 48388360, 62904868, 77421376, 78631085, 96776720, 125809736, 154842752, 157262170, 193553440, 251619472, 309685504, 314524340, 387106880, 503238944, 629048680, 774213760, 1006477888, 1258097360, 1548427520, 2012955776, 2516194720, 4025911552, 5032389440, 10064778880, 20129557760]

約数ペア:

[(1, 20129557760), (2, 10064778880), (4, 5032389440), (5, 4025911552), (8, 2516194720), (10, 2012955776), (13, 1548427520), (16, 1258097360), (20, 1006477888), (26, 774213760), (32, 629048680), (40, 503238944), (52, 387106880), (64, 314524340), (65, 309685504), (80, 251619472), (104, 193553440), (128, 157262170), (130, 154842752), (160, 125809736), (208, 96776720), (256, 78631085), (260, 77421376), (320, 62904868), (416, 48388360), (520, 38710688), (640, 31452434), (832, 24194180), (1040, 19355344), (1280, 15726217), (1664, 12097090), (2080, 9677672), (3328, 6048545), (4160, 4838836), (8320, 2419418), (16640, 1209709)]