20890792

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:206

約数の個数: 64

約数和(自身を含む): 44528400

約数和(自身を除く): 23637608

約数列:

[1, 2, 4, 8, 13, 26, 37, 52, 61, 74, 89, 104, 122, 148, 178, 244, 296, 356, 481, 488, 712, 793, 962, 1157, 1586, 1924, 2257, 2314, 3172, 3293, 3848, 4514, 4628, 5429, 6344, 6586, 9028, 9256, 10858, 13172, 18056, 21716, 26344, 29341, 42809, 43432, 58682, 70577, 85618, 117364, 141154, 171236, 200873, 234728, 282308, 342472, 401746, 564616, 803492, 1606984, 2611349, 5222698, 10445396, 20890792]

約数ペア:

[(1, 20890792), (2, 10445396), (4, 5222698), (8, 2611349), (13, 1606984), (26, 803492), (37, 564616), (52, 401746), (61, 342472), (74, 282308), (89, 234728), (104, 200873), (122, 171236), (148, 141154), (178, 117364), (244, 85618), (296, 70577), (356, 58682), (481, 43432), (488, 42809), (712, 29341), (793, 26344), (962, 21716), (1157, 18056), (1586, 13172), (1924, 10858), (2257, 9256), (2314, 9028), (3172, 6586), (3293, 6344), (3848, 5429), (4514, 4628)]