20921432

素因数分解:

$2^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{53}}^2$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 48957300

約数和(自身を除く): 28035868

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 49, 53, 56, 76, 98, 106, 133, 152, 196, 212, 266, 371, 392, 424, 532, 742, 931, 1007, 1064, 1484, 1862, 2014, 2597, 2809, 2968, 3724, 4028, 5194, 5618, 7049, 7448, 8056, 10388, 11236, 14098, 19663, 20776, 22472, 28196, 39326, 49343, 53371, 56392, 78652, 98686, 106742, 137641, 157304, 197372, 213484, 275282, 373597, 394744, 426968, 550564, 747194, 1101128, 1494388, 2615179, 2988776, 5230358, 10460716, 20921432]

約数ペア:

[(1, 20921432), (2, 10460716), (4, 5230358), (7, 2988776), (8, 2615179), (14, 1494388), (19, 1101128), (28, 747194), (38, 550564), (49, 426968), (53, 394744), (56, 373597), (76, 275282), (98, 213484), (106, 197372), (133, 157304), (152, 137641), (196, 106742), (212, 98686), (266, 78652), (371, 56392), (392, 53371), (424, 49343), (532, 39326), (742, 28196), (931, 22472), (1007, 20776), (1064, 19663), (1484, 14098), (1862, 11236), (2014, 10388), (2597, 8056), (2809, 7448), (2968, 7049), (3724, 5618), (4028, 5194)]