80400440

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{83}}^1\times {\mathrm{397}}^1$

素因数の和:552

約数の個数: 64

約数和(自身を含む): 186550560

約数和(自身を除く): 106150120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 83, 122, 166, 244, 305, 332, 397, 415, 488, 610, 664, 794, 830, 1220, 1588, 1660, 1985, 2440, 3176, 3320, 3970, 5063, 7940, 10126, 15880, 20252, 24217, 25315, 32951, 40504, 48434, 50630, 65902, 96868, 101260, 121085, 131804, 164755, 193736, 202520, 242170, 263608, 329510, 484340, 659020, 968680, 1318040, 2010011, 4020022, 8040044, 10050055, 16080088, 20100110, 40200220, 80400440]

約数ペア:

[(1, 80400440), (2, 40200220), (4, 20100110), (5, 16080088), (8, 10050055), (10, 8040044), (20, 4020022), (40, 2010011), (61, 1318040), (83, 968680), (122, 659020), (166, 484340), (244, 329510), (305, 263608), (332, 242170), (397, 202520), (415, 193736), (488, 164755), (610, 131804), (664, 121085), (794, 101260), (830, 96868), (1220, 65902), (1588, 50630), (1660, 48434), (1985, 40504), (2440, 32951), (3176, 25315), (3320, 24217), (3970, 20252), (5063, 15880), (7940, 10126)]