81261440

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9767}}^1$

素因数の和:9799

約数の個数: 64

約数和(自身を含む): 209230560

約数和(自身を除く): 127969120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 4160, 8320, 9767, 19534, 39068, 48835, 78136, 97670, 126971, 156272, 195340, 253942, 312544, 390680, 507884, 625088, 634855, 781360, 1015768, 1250176, 1269710, 1562720, 2031536, 2539420, 3125440, 4063072, 5078840, 6250880, 8126144, 10157680, 16252288, 20315360, 40630720, 81261440]

約数ペア:

[(1, 81261440), (2, 40630720), (4, 20315360), (5, 16252288), (8, 10157680), (10, 8126144), (13, 6250880), (16, 5078840), (20, 4063072), (26, 3125440), (32, 2539420), (40, 2031536), (52, 1562720), (64, 1269710), (65, 1250176), (80, 1015768), (104, 781360), (128, 634855), (130, 625088), (160, 507884), (208, 390680), (260, 312544), (320, 253942), (416, 195340), (520, 156272), (640, 126971), (832, 97670), (1040, 78136), (1664, 48835), (2080, 39068), (4160, 19534), (8320, 9767)]