16841980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1$

素因数の和:139

約数の個数: 96

約数和(自身を含む): 40642560

約数和(自身を除く): 23800580

約数列:

[1, 2, 4, 5, 10, 19, 20, 23, 38, 41, 46, 47, 76, 82, 92, 94, 95, 115, 164, 188, 190, 205, 230, 235, 380, 410, 437, 460, 470, 779, 820, 874, 893, 940, 943, 1081, 1558, 1748, 1786, 1886, 1927, 2162, 2185, 3116, 3572, 3772, 3854, 3895, 4324, 4370, 4465, 4715, 5405, 7708, 7790, 8740, 8930, 9430, 9635, 10810, 15580, 17860, 17917, 18860, 19270, 20539, 21620, 35834, 36613, 38540, 41078, 44321, 71668, 73226, 82156, 88642, 89585, 102695, 146452, 177284, 179170, 183065, 205390, 221605, 358340, 366130, 410780, 443210, 732260, 842099, 886420, 1684198, 3368396, 4210495, 8420990, 16841980]

約数ペア:

[(1, 16841980), (2, 8420990), (4, 4210495), (5, 3368396), (10, 1684198), (19, 886420), (20, 842099), (23, 732260), (38, 443210), (41, 410780), (46, 366130), (47, 358340), (76, 221605), (82, 205390), (92, 183065), (94, 179170), (95, 177284), (115, 146452), (164, 102695), (188, 89585), (190, 88642), (205, 82156), (230, 73226), (235, 71668), (380, 44321), (410, 41078), (437, 38540), (460, 36613), (470, 35834), (779, 21620), (820, 20539), (874, 19270), (893, 18860), (940, 17917), (943, 17860), (1081, 15580), (1558, 10810), (1748, 9635), (1786, 9430), (1886, 8930), (1927, 8740), (2162, 7790), (2185, 7708), (3116, 5405), (3572, 4715), (3772, 4465), (3854, 4370), (3895, 4324)]