21473920

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1$

素因数の和:150

約数の個数: 128

約数和(自身を含む): 57834000

約数和(自身を除く): 36360080

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 32, 40, 52, 58, 64, 65, 80, 89, 104, 116, 128, 130, 145, 160, 178, 208, 232, 260, 290, 320, 356, 377, 416, 445, 464, 520, 580, 640, 712, 754, 832, 890, 928, 1040, 1157, 1160, 1424, 1508, 1664, 1780, 1856, 1885, 2080, 2314, 2320, 2581, 2848, 3016, 3560, 3712, 3770, 4160, 4628, 4640, 5162, 5696, 5785, 6032, 7120, 7540, 8320, 9256, 9280, 10324, 11392, 11570, 12064, 12905, 14240, 15080, 18512, 18560, 20648, 23140, 24128, 25810, 28480, 30160, 33553, 37024, 41296, 46280, 48256, 51620, 56960, 60320, 67106, 74048, 82592, 92560, 103240, 120640, 134212, 148096, 165184, 167765, 185120, 206480, 241280, 268424, 330368, 335530, 370240, 412960, 536848, 671060, 740480, 825920, 1073696, 1342120, 1651840, 2147392, 2684240, 4294784, 5368480, 10736960, 21473920]

約数ペア:

[(1, 21473920), (2, 10736960), (4, 5368480), (5, 4294784), (8, 2684240), (10, 2147392), (13, 1651840), (16, 1342120), (20, 1073696), (26, 825920), (29, 740480), (32, 671060), (40, 536848), (52, 412960), (58, 370240), (64, 335530), (65, 330368), (80, 268424), (89, 241280), (104, 206480), (116, 185120), (128, 167765), (130, 165184), (145, 148096), (160, 134212), (178, 120640), (208, 103240), (232, 92560), (260, 82592), (290, 74048), (320, 67106), (356, 60320), (377, 56960), (416, 51620), (445, 48256), (464, 46280), (520, 41296), (580, 37024), (640, 33553), (712, 30160), (754, 28480), (832, 25810), (890, 24128), (928, 23140), (1040, 20648), (1157, 18560), (1160, 18512), (1424, 15080), (1508, 14240), (1664, 12905), (1780, 12064), (1856, 11570), (1885, 11392), (2080, 10324), (2314, 9280), (2320, 9256), (2581, 8320), (2848, 7540), (3016, 7120), (3560, 6032), (3712, 5785), (3770, 5696), (4160, 5162), (4628, 4640)]