21865520

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:222

約数の個数: 80

約数和(自身を含む): 53434080

約数和(自身を除く): 31568560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 83, 89, 148, 166, 178, 185, 296, 332, 356, 370, 415, 445, 592, 664, 712, 740, 830, 890, 1328, 1424, 1480, 1660, 1780, 2960, 3071, 3293, 3320, 3560, 6142, 6586, 6640, 7120, 7387, 12284, 13172, 14774, 15355, 16465, 24568, 26344, 29548, 30710, 32930, 36935, 49136, 52688, 59096, 61420, 65860, 73870, 118192, 122840, 131720, 147740, 245680, 263440, 273319, 295480, 546638, 590960, 1093276, 1366595, 2186552, 2733190, 4373104, 5466380, 10932760, 21865520]

約数ペア:

[(1, 21865520), (2, 10932760), (4, 5466380), (5, 4373104), (8, 2733190), (10, 2186552), (16, 1366595), (20, 1093276), (37, 590960), (40, 546638), (74, 295480), (80, 273319), (83, 263440), (89, 245680), (148, 147740), (166, 131720), (178, 122840), (185, 118192), (296, 73870), (332, 65860), (356, 61420), (370, 59096), (415, 52688), (445, 49136), (592, 36935), (664, 32930), (712, 30710), (740, 29548), (830, 26344), (890, 24568), (1328, 16465), (1424, 15355), (1480, 14774), (1660, 13172), (1780, 12284), (2960, 7387), (3071, 7120), (3293, 6640), (3320, 6586), (3560, 6142)]