21620325

素因数分解:

$3^1\times 5^2\times {\mathrm{41}}^1\times {\mathrm{79}}^1\times {\mathrm{89}}^1$

素因数の和:222

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 15877275

約数列:

[1, 3, 5, 15, 25, 41, 75, 79, 89, 123, 205, 237, 267, 395, 445, 615, 1025, 1185, 1335, 1975, 2225, 3075, 3239, 3649, 5925, 6675, 7031, 9717, 10947, 16195, 18245, 21093, 35155, 48585, 54735, 80975, 91225, 105465, 175775, 242925, 273675, 288271, 527325, 864813, 1441355, 4324065, 7206775, 21620325]

約数ペア:

[(1, 21620325), (3, 7206775), (5, 4324065), (15, 1441355), (25, 864813), (41, 527325), (75, 288271), (79, 273675), (89, 242925), (123, 175775), (205, 105465), (237, 91225), (267, 80975), (395, 54735), (445, 48585), (615, 35155), (1025, 21093), (1185, 18245), (1335, 16195), (1975, 10947), (2225, 9717), (3075, 7031), (3239, 6675), (3649, 5925)]