20201220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:214

約数の個数: 144

約数和(自身を含む): 67420080

約数和(自身を除く): 47218860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 65, 78, 89, 90, 97, 117, 130, 156, 178, 180, 194, 195, 234, 260, 267, 291, 356, 388, 390, 445, 468, 485, 534, 582, 585, 780, 801, 873, 890, 970, 1068, 1157, 1164, 1170, 1261, 1335, 1455, 1602, 1746, 1780, 1940, 2314, 2340, 2522, 2670, 2910, 3204, 3471, 3492, 3783, 4005, 4365, 4628, 5044, 5340, 5785, 5820, 6305, 6942, 7566, 8010, 8633, 8730, 10413, 11349, 11570, 12610, 13884, 15132, 16020, 17266, 17355, 17460, 18915, 20826, 22698, 23140, 25220, 25899, 34532, 34710, 37830, 41652, 43165, 45396, 51798, 52065, 56745, 69420, 75660, 77697, 86330, 103596, 104130, 112229, 113490, 129495, 155394, 172660, 208260, 224458, 226980, 258990, 310788, 336687, 388485, 448916, 517980, 561145, 673374, 776970, 1010061, 1122290, 1346748, 1553940, 1683435, 2020122, 2244580, 3366870, 4040244, 5050305, 6733740, 10100610, 20201220]

約数ペア:

[(1, 20201220), (2, 10100610), (3, 6733740), (4, 5050305), (5, 4040244), (6, 3366870), (9, 2244580), (10, 2020122), (12, 1683435), (13, 1553940), (15, 1346748), (18, 1122290), (20, 1010061), (26, 776970), (30, 673374), (36, 561145), (39, 517980), (45, 448916), (52, 388485), (60, 336687), (65, 310788), (78, 258990), (89, 226980), (90, 224458), (97, 208260), (117, 172660), (130, 155394), (156, 129495), (178, 113490), (180, 112229), (194, 104130), (195, 103596), (234, 86330), (260, 77697), (267, 75660), (291, 69420), (356, 56745), (388, 52065), (390, 51798), (445, 45396), (468, 43165), (485, 41652), (534, 37830), (582, 34710), (585, 34532), (780, 25899), (801, 25220), (873, 23140), (890, 22698), (970, 20826), (1068, 18915), (1157, 17460), (1164, 17355), (1170, 17266), (1261, 16020), (1335, 15132), (1455, 13884), (1602, 12610), (1746, 11570), (1780, 11349), (1940, 10413), (2314, 8730), (2340, 8633), (2522, 8010), (2670, 7566), (2910, 6942), (3204, 6305), (3471, 5820), (3492, 5785), (3783, 5340), (4005, 5044), (4365, 4628)]