21913840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{1109}}^1$

素因数の和:1154

約数の個数: 80

約数和(自身を含む): 57808800

約数和(自身を除く): 35894960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 38, 40, 52, 65, 76, 80, 95, 104, 130, 152, 190, 208, 247, 260, 304, 380, 494, 520, 760, 988, 1040, 1109, 1235, 1520, 1976, 2218, 2470, 3952, 4436, 4940, 5545, 8872, 9880, 11090, 14417, 17744, 19760, 21071, 22180, 28834, 42142, 44360, 57668, 72085, 84284, 88720, 105355, 115336, 144170, 168568, 210710, 230672, 273923, 288340, 337136, 421420, 547846, 576680, 842840, 1095692, 1153360, 1369615, 1685680, 2191384, 2739230, 4382768, 5478460, 10956920, 21913840]

約数ペア:

[(1, 21913840), (2, 10956920), (4, 5478460), (5, 4382768), (8, 2739230), (10, 2191384), (13, 1685680), (16, 1369615), (19, 1153360), (20, 1095692), (26, 842840), (38, 576680), (40, 547846), (52, 421420), (65, 337136), (76, 288340), (80, 273923), (95, 230672), (104, 210710), (130, 168568), (152, 144170), (190, 115336), (208, 105355), (247, 88720), (260, 84284), (304, 72085), (380, 57668), (494, 44360), (520, 42142), (760, 28834), (988, 22180), (1040, 21071), (1109, 19760), (1235, 17744), (1520, 14417), (1976, 11090), (2218, 9880), (2470, 8872), (3952, 5545), (4436, 4940)]